JP4809202B2 - Blind operating device - Google Patents

Description

  The present invention relates to a blind operating device for operating raising / lowering of a blind shielding material.

  Conventionally, as this kind of blind, a curtain opening and closing device described in Patent Document 1 is known. The device described in Patent Document 1 is a chain drive type curtain opening / closing device that manually opens and closes a chain formed by looping to rotate the chain foil to open and close the curtain. However, the entire peripheral surface of the chain wheel meshing with the chain is surrounded by a buffer member except for the lower peripheral surface of the chain wheel corresponding to the pulling side of the chain. As a result, the chain beads come into contact with the buffer member that surrounds the entire peripheral surface of the chain wheel, so that the impact generated during the collision is absorbed.

No. 8-3336

  However, in the above-described conventional configuration, the chain hangs directly under the chain wheel. Therefore, in order to prevent the chain and the shade from interfering with each other, the drive unit incorporating the chain wheel is arranged on the outer side in the width direction than the shade. There is a problem that a gap is generated between the end of the shade and the window frame.

  Moreover, since the buffer member surrounds the whole chain wheel peripheral surface, there exists a problem that cost starts.

  The present invention has been made in view of such a problem, and an object of the present invention is to provide a blind operating device that can prevent interference with the screen and reduce collision noise by reducing collision of the ball chain. And

In order to achieve the above-mentioned object, the invention according to claim 1 includes a pulley rotatably supported, a case for accommodating the pulley, a ball chain wound around the pulley and led out from the case, In the operating device of the blind, wherein the pulley is rotated by operating the chain, and the shielding material is moved up and down by the rotation of the pulley,
The blind operating device is arranged on the front side of the shielding material so as to overlap in the width direction of the shielding material, the rotation axis of the pulley faces the width direction of the shielding material, and the ball chain led out from the case is directed forward. slope is provided for guiding, the slope is constituted by a slope body which projects to the front side downward is formed integrally, and the buffer material mounted detachably on slope body to cover the upper surface of the slope body case , front derivation portion of the ball chain, without being affected by the slope, as well as hanging from the front of the separating position between the ball chain and the pulley, arranged so that only the side outlet portion after the ball chain is guided to the slope It is characterized by that.

The invention according to claim 2 is characterized in that the length of the slope according to claim 1 is set such that any two or more ball portions constituting the ball chain always contact the cushioning material. .

According to a third aspect of the present invention, the cushioning material according to the first or second aspect constitutes the ball chain from the highest position where the ball chain separated from the pulley contacts the slope during the movement of the ball chain to the highest position. When the ball portion is located, it is provided over at least the position where the ball portion adjacent below exists.

  According to the present invention, when the ball chain is operated, the slope on which the ball chain mainly collides is configured by the cushioning material, so that the collision that occurs when hitting the slope can be reduced and the collision sound can be reduced. . Since the ball chain can be guided to the near side by the slope, the ball chain can be suspended at a position where it does not interfere with the shielding material even if the operating device and the shielding material overlap in the width direction.

By configuring the slope with a cushioning material, the cost can be reduced. Further, since the slope is provided corresponding to only the rear lead-out portion of the front lead-out portion and the rear lead-out portion of the ball chain, the resistance received by the ball chain from the slope can be kept small.

  Cost can be reduced by covering the upper surface of the slope body with the cushioning material.

  Since the cushioning material is detachably attached to the slope body, it can be replaced with a new one when the mitigation effect is reduced due to the secular change of the cushioning material.

According to the second aspect of the present invention, since any two or more ball portions constituting the ball chain always come into contact with the cushioning material, flapping of the ball chain can be prevented.

According to the third aspect of the present invention, it is possible to prevent the ball chain from flapping when the ball portion constituting the ball chain is separated from the pulley and contacts the slope.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a front view showing an example of a blind to which the blind operating device of the present invention is applied. In this example, the blind 10 is a pleated screen, and includes a head box 12 that is attached to a fixed portion such as a window frame by a bracket 11, and a plurality of ridges that are shielding materials are continuous from the head box 12 in the vertical direction. The screen 14 formed in this manner is suspended so as to be lifted and lowered. A bottom rail 16 is provided at the lower end of the screen 14.

  A plurality of elevating cords 18, 18 are suspended from the head box 12, and the lower end of the elevating cord 18 is attached to the bottom rail 16. The upper end of the lifting / lowering cord 18 is introduced into the head box 12 and attached to a winding drum 20 disposed in the head box 12 so as to be wound and unwound. A rotary drive shaft 22 that is rotatably supported in the head box 12 passes through the winding drum 20 so as not to be relatively rotatable. The winding drum 20 rotates together with the rotary drive shaft 22. The rotary drive shaft 22 is connected to the blind operating device 30 of the present invention provided at one end of the head box 12.

  The blind operating device 30 has a case 32 attached to one end of the head box 12. As shown in FIG. 3 and FIG. 4, the case 32 includes a first case 34 and a second case 36 that are each formed of a hard plastic molded product and can be separated. The first case 34 and the second case 36 are normally fitted together and screwed with a screw 37 to form an integrated case 32, and are separated by removing the screw 37. Further, an opening 32 a is formed by a gap between the first case 34 and the second case 36 from the vicinity of the front vertical direction center portion of the case 32 to the bottom front portion. In this example, the case 32 is composed of two parts, ie, the first case 34 and the second case 36, but the case 32 is not necessarily limited to this, and can be composed of any other number of parts.

  A pulley 38 is rotatably accommodated in the case 32. The pulley 38 is pivotally supported by a boss 32 b formed on the first case 34, and the rotation axis thereof is parallel to the surface of the screen 14, that is, parallel to the width direction of the blind 10 and the screen 14. On the outer peripheral surface of the pulley 38, a plurality of recesses 38a into which ball portions 42b of a ball chain 42 described later are fitted are formed.

  A transmission unit 40 composed of a plurality of gears is connected to the pulley 38, and the rotation of the pulley 38 is transmitted to the rotary drive shaft 22 by the transmission unit 40.

  An endless ball chain 42 is wound around the pulley 38. The ball chain 42 includes a string portion 42a and a ball portion 42b that is formed at predetermined intervals of the string portion 42a and can be fitted into the recess 38a of the pulley 38. A portion of the ball chain 42 that is not wound around the pulley 38 passes through the opening 32 a and is led out from the case 32. Two lead-out portions of the ball chain 42 passing through the opening 32a are divided into a front lead-out portion 42F and a rear lead-out portion 42R.

  The opening 32a of the case 32 is formed with a slope main body 32c that protrudes downward toward the front side corresponding to a portion corresponding to the rear lead-out portion 42R of the ball chain 42. Specifically, the slope main body 32 c is formed integrally with a first case 34 constituting the case 32.

  A cushioning material 44 is attached to the upper surface of the slope body 32c so as to cover the upper surface. Specifically, the cushioning material 44 is detachably attached to the slope main body 32c by being fitted into a recess 32d formed on the rear side from the uppermost position of the slope main body 32c and by turning around the lower end of the slope main body 32c. . The second case 36 is separated from the first case 34, the buffer material 44 is inserted from the second case 36 side of the first case 34, and the second case 36 is coupled to the first case 34 again. Can be set on the slope body 32c.

  The cushioning material 44 is made of a material that is more elastic than the material constituting the case 32 and more preferably has a reduced frictional resistance. For example, synthetic rubber such as urethane rubber, thermoplastic elastomer, silicone rubber, soft plastic, etc. It can consist of

  A slope 46 is constituted by the slope body 32 c and the buffer material 44.

  As shown in FIGS. 5 and 6, the slope 46 leads the rear lead-out portion 42 </ b> R of the ball chain 42 toward the front side of the vertical tangent on the rear side of the pulley 38. 42R is the uppermost position where the ball chain 42 separated from the pulley 38 is in contact with the slope 46 during the movement of the ball chain 42 (that is, the ball portion 42b indicated by the dotted line in FIG. 6 does not go to the dotted line position). The rear lead-out portion 42R hangs in front of the vertical tangent on the rear side and in front of the uppermost position. On the other hand, the front lead-out portion 42F of the ball chain 42 is not affected by the slope 46, but is almost along the vertical tangent line on the front side of the pulley 38 and directly below the front side separation position of the ball chain 42 and the pulley 38. It hangs down at the position.

  In this manner, since the rear lead-out portion of the ball chain 42 is guided to the near side by the slope 46, interference between the ball chain 42 and the screen 14 can be prevented. For this purpose, the operation device 30 is arranged on the front side of the screen 14 so as to overlap in the width direction of the screen 14.

  In the blind operating device configured as described above, when the lower side is held down by holding the front lead-out portion 42F of the ball chain 42 in order to perform the screen raising operation, as shown in FIG. The side lead-out portion 42R is drawn onto the slope 46 below the pulley 38 while swinging as indicated by the dotted line in the figure. At this time, since the buffer material 44 protrudes downward toward the front side, the collision between the ball chain 42 and the slope 46 can be alleviated and the collision noise can be reduced.

  During the screen lowering operation, as shown in FIG. 6, the ball chain 42 moves in the direction opposite to that in FIG. At this time, the ball chain 42 is operated to be pushed forward from the lower side of the pulley 38. When the ball portion 42b of the ball chain 42 is separated from the pulley 38, as shown in the figure, the ball portion 42b hits the cushioning material 44 of the slope 46, so that the collision can be eased and the collision noise can be reduced.

  The length of the slope 46 in the vertical direction is preferably such that at least two adjacent ball portions 42 a of the ball chain 42 are always in contact with the cushioning material 44. As a result, the fluttering of the ball chain 42 can be suppressed as compared with the case where only one ball portion 42 a contacts the cushioning material 44.

  Further, the vertical length of the cushioning material 44 is such that the ball chain 42 separated from the pulley 38 contacts the slope 46 during the movement of the ball chain 42 (that is, the ball indicated by the dotted line in FIG. 6). When the ball portion 42a is located at the uppermost position from the point 42b where the portion 42b does not go to the dotted line position), at least the position where the adjacent ball portion 42a is present is provided. Good. Thereby, the impact noise when the ball chain 42 is separated from the pulley 38 and comes into contact with the slope 46 can be reduced by the buffer material 44, and flapping of the ball chain 42 that can occur when the ball chain 42 is separated can be suppressed. .

  In this way, even when the operating device 30 and the screen 14 overlap in the front-rear direction, the slope 46 can prevent the ball chain 42 and the screen 14 from interfering with each other, so that the screen 14 can be maximized in the width direction. It is possible to prevent the occurrence of a gap between the screen 14 and a window frame or the like where the blind is set. Further, since the portion corresponding to the front lead-out portion 42F of the ball chain 42 has no slope, the resistance acting on the ball chain 42 can be suppressed.

  Since the buffer material 44 is provided only in the slope main body 32c, it can be set at low cost.

  When the elasticity of the cushioning material 44 deteriorates due to secular change, the effect of reducing the impact noise decreases, and in this case, the cushioning material 44 can be replaced. As described above, the first case 34 and the second case 36 are separated as described above, the buffer material 44 is removed from the first case 34, and a new buffer material 44 is inserted. This can be done easily by connecting the case 36.

  Further, as shown in FIG. 7, by providing a cushioning material 54 made of the same material as the slope 46 at a position where the ball chain 42 interferes with the bottom rail 16, the ball chain 42 that swings during operation contacts the bottom rail 16. It is possible to alleviate the collision at the time of the operation, and to further reduce the collision noise caused by the ball chain 16.

It is a front view showing an example of the blind to which the blind operating device of the present invention is applied. It is a side view of the blind of FIG. It is a perspective view except the ball chain of the operating device of the blind of this invention. It is a disassembled perspective view of the operating device of the blind of this invention. It is explanatory drawing showing the time of operation of the operating device of the blind of this invention. It is explanatory drawing showing the time of another operation of the operating device of the blind of this invention. It is a side view which shows the state which provided the shock absorbing material in the bottom rail of a blind.

Explanation of symbols

10 Blind 14 Screen (shielding material)
30 Blind operating device 32 Case 32c Slope body 38 Pulley 42 Ball chain 42b Ball portion 42F Front lead-out portion 42R Rear lead-out portion 44 Shock absorber 46 Slope

Claims (3)

A pulley that is rotatably supported, a case that accommodates the pulley, and a ball chain that is wound around the pulley and led out of the case. In the operating device of the blind, where the shielding material is moved up and down by rotation,
The blind operating device is arranged on the front side of the shielding material so as to overlap in the width direction of the shielding material, the rotation axis of the pulley faces the width direction of the shielding material, and the ball chain led out from the case is directed forward. slope is provided for guiding, the slope is constituted by a slope body which projects to the front side downward is formed integrally, and the buffer material mounted detachably on slope body to cover the upper surface of the slope body case , front derivation portion of the ball chain, without being affected by the slope, as well as hanging from the front of the separating position between the ball chain and the pulley, arranged so that only the side outlet portion after the ball chain is guided to the slope A blind operating device. The length of the slope, any two or more blind operating device according to claim 1, wherein the ball portion is always characterized in that it is configured to contact the cushioning material constituting the ball chain. The cushioning material has at least a ball part adjacent below when the ball part constituting the ball chain is located at the uppermost position from the uppermost position at which the ball chain separated from the pulley contacts the slope when the ball chain moves. blind operating device according to claim 1 or 2, wherein the provided over until a position.

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